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sodium hypochlorite process gold

2020-09-05T10:09:54+00:00
  • Advances in Gold and Silver Processing

    In a 0.5 % sodium hypochlorite solution, less than 30 % of gold is dissolved in one hour. As the concentration of sodium hypochlorite increases the rate of gold dissolution increases. In a 2 % sodium hypochlorite solution, 88 % of the gold is dissolved in 20 minutes and more than 91 % of the gold dissolved in one hour.

  • Hypochlorite Leaching of Gold Ore

    The reactions between gold and hypochlorite leach solutions containing hydrochloric acid and sodium chloride are demonstrated below: 4Au + 16NaOCl + 10H2O → 4HAuCl4 ...

  • Gold Recovery Process from Primary and Secondary Resources ...

    However, by adding sodium hypochlorite to the gold(I) solution in hydrochloric acidic media, ... the main hydrometallurgical process for gold and silver ores is cyanide leaching followed by gold recovery by means of adsorption on strongly basic anion exchange resins and activated carbon or by means of cementation using zinc powder. In the adsorption process, the adsorbed gold is recovered by ...

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  • sodium hypochlorite process gold

    sodium hypochlorite process gold. Sodium Hypochlorite The Chlorine Institute. Sodium hypochlorite (NaOCl) is a solution made from reacting chlorine with a sodium hydroxide solution. These two reactants are the major coproducts from most chloralkali cells. Sodium hypochlorite, commonly referred to as . Get Price. How to Use Bleach on Gold Ore to Remove Gold Sciencing. Apr 24, 2017 Gold

  • How to Use Bleach on Gold Ore to Remove Gold Sciencing

    Bleach is the chemical compound sodium hypochlorite. When combined with hydrochloric acid, the mixture produces chlorine that dissolves gold from gold ore. This was the first commercial method used for gold extraction. Place the ore into the mortar and grind it to the size of sand grains.

  • Sodium hypochlorite - Wikipedia

    In the process, sodium hypochlorite (NaClO) and sodium chloride (NaCl) are formed when chlorine is passed into cold dilute sodium hydroxide solution. The chlorine is prepared industrially by electrolysis with minimal separation between the anode and the cathode. The solution must be kept below 40 °C (by cooling coils) to prevent the undesired formation of sodium chlorate. Commercial solutions ...

  • Chemical formula: NaOCl
  • Hypochlorous acid - Wikipedia

    Hypochlorous acid (HOCl or HClO) is a weak acid that forms when chlorine dissolves in water, and itself partially dissociates, forming hypochlorite, ClO −.HClO and ClO − are oxidizers, and the primary disinfection agents of chlorine solutions. HClO cannot be isolated from these solutions due to rapid equilibration with its precursor. Sodium hypochlorite (NaClO) and calcium hypochlorite (Ca ...

  • Chemical formula: HOCl
  • (PDF) Detoxification of Cyanide in a Gold Processing Plant ...

    Abstract In laboratory experiments, cyanide in waste water from the Muteh gold mine in Iran was oxidized by sodium and calcium hypochlorite to cyanate (CNO−), which is 1,000 times less...

  • Manufacturing Process - Sodium Hypochlorite

    There are many stages to be done to create sodium hypochlorite. The process is split in two components called, "Reaction and Product Discharge" and "Bleach Filtration". (" Intratec Solutions LLC", 2005) In the Reaction and Product Discharge stage, there is a chlorine absorption system that

  • sodium hypochlorite process gold

    sodium hypochlorite process gold. Sodium Hypochlorite The Chlorine Institute. Sodium hypochlorite (NaOCl) is a solution made from reacting chlorine with a sodium hydroxide solution. These two reactants are the major coproducts from most chloralkali cells. Sodium hypochlorite, commonly referred to as . Get Price. How to Use Bleach on Gold Ore to Remove Gold Sciencing. Apr 24, 2017 Gold

  • Dissolution of Silver and Gold with Sodium Hypochlorite ...

    2020-05-07  Request PDF Dissolution of Silver and Gold with Sodium Hypochlorite and Hydrochloric Acid in Refractory Minerals (Mangano-Argentiferous) The present study examined a process

  • (PDF) Chloride-hypochlorite oxidation and leaching of ...

    An alternative non-cyanide lixiviant, namely sodium hypochlorite, has been used for the selective extraction of gold and silver from a copper concentrate. Hypochlorite leaching of the as-received ...

  • Sodium Hypochlorite Chemical Production - Chemical ...

    Sodium hypochlorite chemical production is a well-established process in the industry, and the principle behind its operation is also employed for preventing chlorine emissions in chlor-alkali plants. The chemical process relies on the acquisition of chlorine and caustic soda (sodium hydroxide; NaOH) feedstock from external sources, in contrast with the electrochemical process for bleach ...

  • Selecting an appropriate method to remove cyanide from the ...

    In this paper, in order to select the most appropriate method to remove cyanide from the wastewater of the Moteh gold mine, based on the experts' opinions, the use of calcium hypochlorite, sodium hypochlorite, and hydrogen peroxide was chosen as forerunning alternative in the form of a multi-stage model. Then, seven criteria including the amount of material consumed, ease of implementation ...

  • Effect of Pretreatment of Sulfide Refractory Concentrate ...

    The majority of the refractory gold and silver occurs in occlusion in sulphides, then precious metal dissolution is possi- ble by first oxidizing auriferous sulfide concentrate using sodium hypochlorite-sodium-hydroxide solution followed of pressure cyanidation of the oxidized concentrate, for the extraction of precious metals. This process was ...

  • DISSOLUTION OF SILVER AND GOLD WITH SODIUM HYPOCHLORITE ...

    The present study examined a process for precious metals recovery (silver and gold) from difficult minerals which exhibit refractory characteristics to cyanidation and ammonium thiosulfate leaching (low extraction and high consumption of leaching agent). It is well known that mangano-argentiferous minerals are mainly composed of manganese, silver, gold and iron. In this research, a mineral ...

  • Sodium Hypochlorite - an overview ScienceDirect Topics

    Sodium hypochlorite, sodium chlorite and hydrogen peroxide are traditionally used for bleaching cotton and linen products ... These enzymes are used in the finishing process for jeans fabrics, in order to create a ‘stone-washed’ effect, caused by topical removal of the indigo dye. In this process, no damage of the fibre occurs, thus the products do not lose their mechanical parameters ...

  • Sodium Hypochlorite (Bleach) Storage Tanks Specifications

    Sodium hypochlorite metal contamination can occur through residual impurities in the sodium hydroxide that is used in the manufacturing process, by using copper piping and stainless steel fittings, by using hard water during manufacture or dilution, and/or by not filtering the sodium hypochlorite product as this will leave residual contaminants in solution. A product of 50 PPB (parts per ...

  • Continuous Sodium Hypochlorite Production (Bleach Plant)

    The Powell Continuous Sodium Hypochlorite Process System, also referred to as a Bleach Plant, is designed to manufacture sodium hypochlorite with greater efficiency and higher quality than previously obtainable with batch or continuous methods. The process, which uses liquid or vapor chlorine and caustic, is versatile and has the design capability of making any concentration of sodium ...

  • Effect of Pretreatment of Sulfide Refractory Concentrate ...

    The majority of the refractory gold and silver occurs in occlusion in sulphides, then precious metal dissolution is possi- ble by first oxidizing auriferous sulfide concentrate using sodium hypochlorite-sodium-hydroxide solution followed of pressure cyanidation of the oxidized concentrate, for the extraction of precious metals. This process was ...

  • Sodium Hypochlorite - an overview ScienceDirect Topics

    Sodium hypochlorite, sodium chlorite and hydrogen peroxide are traditionally used for bleaching cotton and linen products ... These enzymes are used in the finishing process for jeans fabrics, in order to create a ‘stone-washed’ effect, caused by topical removal of the indigo dye. In this process, no damage of the fibre occurs, thus the products do not lose their mechanical parameters ...

  • Hypochlorite Sodium - an overview ScienceDirect Topics

    A sodium hypochlorite accident resulting in life-threatening airway obstruction was reported in a 42-old female patient undergoing routine root canal therapy with 3% sodium hypochlorite (12 ml over 1 h); the patient was treated with 3 days on mechanical ventilation and fully recovered without any skin necrosis or nerve deficits within 3 weeks. Careful injection without pressure, the use of ...

  • Sodium Hypochlorite Price, 2020 Sodium Hypochlorite Price ...

    Sodium Hypochlorite Price - Select 2020 high quality Sodium Hypochlorite Price products in best price from certified Chinese Manufacturing Sodium Hypochlorite manufacturers, Sodium Process Calcium Hypochlorite suppliers, wholesalers and factory on Made-in-China, page 2

  • (1) BLEACH .1 % 1000 PARTS PER MILLION SODIUM HYPOCHLORITE ...

    The use of 0.1% sodium hypochlorite (dilution 1:50 if household bleach at an initial concentration of 5% is used) after cleaning with a neutral detergent is suggested for decontamination purposes, although no data on the effectiveness against the SARS-CoV-2 are available. For surfaces that could be damaged by sodium hypochlorite, 70% concentration of ethanol is needed for decontamination after ...

  • DISSOLUTION OF SILVER AND GOLD WITH SODIUM HYPOCHLORITE ...

    The present study examined a process for precious metals recovery (silver and gold) from difficult minerals which exhibit refractory characteristics to cyanidation and ammonium thiosulfate leaching (low extraction and high consumption of leaching agent). It is well known that mangano-argentiferous minerals are mainly composed of manganese, silver, gold and iron. In this research, a mineral ...

  • US3498924A - Process for preparing stable sodium ...

    hypochlorite sodium solid sodium hypochlorite hypochlorites Prior art date 1966-03-10 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number Inventor Robert H Walsh Albert Dietz Current Assignee (The listed assignees may ...

  • Mechanisms of Actions of Sodium Hypochlorite in Cleaning ...

    microbes (disinfection) are performed with sodium hypochlorite in a single process. However, the *Correspondingauthor.Tel:+81-86-286-9600,Fax:+81-86-286-9630. 148S.FUKUZAKl TABLE 1. Characteristics of sodium hypochlorite solution as the ideal disinfectant. mechanisms of sodium hypochlorite actions in clean- ing and disinfection processes are originally different from each other.

  • Calcium Hypochlorite Plant - Nanjing Kapsom Engineering ...

    There are two processes to product calcium hypochlorite. Sodium process and calcium process. Sodium process is more preferred by clients as higher quality product. Product Quality Sodium Process Calcium Process; Available chlorine, % Not less than 70: 60-65: Consumption/ton Product: Sodium Process: Calcium Process: Chlorine, ton: Less than 1.0 : Less than 2.0: NaOH, ton: Less

  • Cyanide Destruction: A New Look at an Age-Old Problem ...

    Traditional treatment involves a high pH of 10.5, and a high oxidation-reduction potential (ORP) of +600 mV. It is a chemically heavy process, using approximately 23 gallons of 12.5% sodium hypochlorite solution to destroy one ounce of cyanide. Sodium hypochlorite usage at this rate is quite high.

  • Dissolution of Silver and Gold with Sodium Hypochlorite ...

    2020-04-15  Two-stage leaching was carried out: first to eliminate manganese from the sample using sodium sulfite (Na 2 SO 3) as a reductive reagent and sulfuric acid (H 2 SO 4) and a second stage to dissolve silver and gold with sodium hypochlorite (NaClO) and hydrochloric acid (HCl); the results show extraction around 96% for Mn and 98.73% and 83% of Ag and Au, respectively.

  • US3498924A - Process for preparing stable sodium ...

    hypochlorite sodium solid sodium hypochlorite hypochlorites Prior art date 1966-03-10 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number Inventor Robert H Walsh Albert Dietz Current Assignee (The listed assignees may ...

  • Sodium Hypochlorite: Indications, Side Effects, Warnings ...

    2020-06-23  If you use sodium hypochlorite on a regular basis, use a missed dose as soon as you think about it. If it is close to the time for your next dose, skip the missed dose and go back to your normal time. Do not use 2 doses at the same time or extra doses. Many times sodium hypochlorite is used on an as needed basis. Do not use more often than told by the doctor. ...

  • Calcium Hypochlorite Plant - Nanjing Kapsom Engineering ...

    There are two processes to product calcium hypochlorite. Sodium process and calcium process. Sodium process is more preferred by clients as higher quality product. Product Quality Sodium Process Calcium Process; Available chlorine, % Not less than 70: 60-65: Consumption/ton Product: Sodium Process: Calcium Process: Chlorine, ton: Less than 1.0 : Less than 2.0: NaOH, ton: Less

  • Manufacturing Process - Bleach (Sodium Hypochlorite)

    The manufacturing process of sodium hypochlorite bleach is lengthy, but everything can be done at one large manufacturing facility. Raw Materials The raw materials used for making bleach are chlorine, caustic soda, and water. Resource Extraction Chlorine and caustic soda are produced by putting electricity through a sodium chloride salt solution. This process is called electrolysis. Sodium ...

  • Sodium Hypochlorite - The Chlorine Institute

    If you produce or use sodium hypochlorite, CI strongly suggests that you also consider obtaining Pamhplet 96, Sodium Hypochlorite Manual and the Handling of Sodium Hypochlorite Safety Video. These products can be ordered on this website in the CI Bookstore. Bleach - Storage Guidelines for End Users . Sodium Hypochlorie (NaOCI) Incompatibility Chart (English Version) Sodium Hypochlorite

  • Sodium hypochlorite NaOCl - PubChem

    Soln of sodium hypochlorite containing 0.45-0.50 g of the salt in 100 ml. Prepd by diluting with distilled water a soln of sodium hypochlorite, adding a 5% soln of sodium bicarbonate, nad adjusting to proper strength and concn according to procedure described in N.F. May be prepared also from 15.4 g chlorinated lime (30% available chlorine), 7.7 g anhydrous sodium carbonate, and 6.4 g sodium ...

  • Cyanide Destruction: A New Look at an Age-Old Problem ...

    Traditional treatment involves a high pH of 10.5, and a high oxidation-reduction potential (ORP) of +600 mV. It is a chemically heavy process, using approximately 23 gallons of 12.5% sodium hypochlorite solution to destroy one ounce of cyanide. Sodium hypochlorite usage at this rate is quite high.

  • Shelf-Life of a 2.5% Sodium Hypochlorite Solution as ...

    sodium hypochlorite is dissolved in water, depending on the pH of the solution: hypochlorous acid (HOCl) and hy-pochlorite ion (OCl-). Hypochlorous acid is responsible for most of the effective antimicrobial action, although hypochlorite ion may also contribute to it. Antiseptic/ disinfectant action is due to chlorination of microbial plasma proteins/enzymatic systems. Vianna et al. (3) and ...

  • Sodium hypochlorite Manufacturers Suppliers, China ...

    sodium hypochlorite manufacturer/supplier, China sodium hypochlorite manufacturer factory list, find qualified Chinese sodium hypochlorite manufacturers, suppliers, factories, exporters wholesalers quickly on Made-in-China.

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